AutoCodes – GMC – C038D 2015 GMC Sierra

C038D 2015 GMC Sierra Code - Range Actuator Position Not Learned

Quick Answer

This is an internal programming fault detection of the transfer case control module. Common causes include Perform Range Actuator Learn Procedure. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C038D 2015 GMC Sierra indicates Range Actuator Position Not Learned.
Common causes: Common causes include Perform Range Actuator Learn Procedure.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 425

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C038D 2015 GMC Sierra Description

This is an internal programming fault detection of the transfer case control module. No external circuits are involved.
This Diagnostic Trouble Code (DTC) is set anytime a transfer case control module is replaced or reprogrammed. The Range Actuator Learn procedure must be performed in order for the transfer case control module to learn current clutch tolerance based on clutch stack up and accumulated clutch wear.

OBDII Code C038D 2015 GMC Sierra - Range Actuator Position Not Learned - AutoCodes.com — C038D 2015 GMC Sierra Code - Range Actuator Position Not Learned

What does this mean?

What are the Possible Causes of the DTC C038D 2015 GMC Sierra?

Perform Range Actuator Learn Procedure

How to Fix the DTC C038D 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C038D 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C038D 2015 GMC Sierra code?

Need more information on how to fix the C038D 2015 GMC Sierra code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C038D 2015 GMC Sierra Code

What does OBDII code C038D mean for a 2015 GMC Sierra?

OBDII code C038D indicates that the range actuator position has not been learned by the vehicle's control module, which can affect the transmission's ability to shift properly.

What are the common symptoms of the C038D code?

Common symptoms include transmission shifting issues, such as slipping or harsh shifts, and the check engine light being illuminated on the dashboard.

What could cause the C038D code to trigger?

Causes may include a faulty range actuator, issues with the transmission control module (TCM), wiring problems, or low transmission fluid levels.

How can I diagnose the C038D code?

To diagnose C038D, use an OBDII scanner to read the code and any related codes. Inspect the range actuator and wiring for damage, and check transmission fluid levels.

What repairs are typically needed for the C038D code?

Repairs may involve replacing the range actuator, reprogramming or replacing the TCM, or fixing any wiring issues. In some cases, a simple reset of the system might be required.

Can I drive my 2015 GMC Sierra with the C038D code?

While it may be possible to drive the vehicle, it is not recommended, as it can lead to further transmission damage or driveability issues.

How can I reset the C038D code?

You can reset the C038D code by using an OBDII scanner to clear the code, but itâ€™s important to address the underlying issue to prevent it from returning.

Is it safe to ignore the C038D code?

Ignoring the C038D code is not safe, as it can lead to worsening transmission problems and affect the vehicle's performance and safety.

Will clearing the code fix the issue permanently?

Clearing the code may temporarily remove the check engine light, but it will not fix the underlying problem. Proper diagnosis and repair are necessary for a permanent solution.